Cropping An Image - Christie M Series User Manual

3. To change the height of the image while keeping the width constant, altering the aspect ratio
of the display, adjust the Vertical Stretch.
4. To move the image right or left within the area of available pixels, adjust the H-Position.
The value shown represents where the approximate center of the image lies in relation to the
total number of pixels available horizontally. This varies widely according to the signal; watch
the image while adjusting.
5. To move the image up or down within the area of available pixels, adjust the V-Position.
The value shown represents the approximate center of the image in relation to the total
number of pixels available vertically. This varies widely according to the signal; watch the
image while adjusting.
6. To ensure that auto setup for any source maintains the input aspect ratio when the default size
is calculated, select Keep Aspect on Auto Setup.
If disabled and the source is not a special case video source where a default stretch is defined,
the source is scaled to fit the platform.
7. If the display has steady flickering or several soft vertical stripes or bands across the entire
image, adjust the Pixel Track.
Proper pixel tracking ensures that the image quality is consistent across the screen, the aspect
ratio is maintained, and that the pixel phase can be optimized. Tracking determines the
frequency of the pixel-sampling clock, indicated by the number of incoming pixels per line, so
that all pixels generated by a particular source are sampled. By default, the projector samples
at the correct frequency for most sources.
For best results, use a test pattern such as a smooth grey consisting of a clear pattern of black
and white pixels, or a similar half on, half off graphic image, such as the Windows 2000
shutdown screen. Adjust the slide bar until the vertical stripes broaden to the point where one
large stripe fills the image.
8. If the image shows shimmer or noise after pixel tracking is optimized adjust the Pixel Phase
until the image stabilizes and each pixel is clearly defined.
You may notice that you can stabilize the image at more than one point.
Pixel phase adjusts the phase of the pixel-sampling clock relative to the incoming signal.
If some shimmer from a video or HDTV source persists, use the Filter control to remove high-
frequency noise from the signal.

Cropping an image

Blanking defines the size of the active input window, or area of interest, and crops the image so that
unwanted edges are removed from the display and changed to black. The range of adjustment
depends on the source resolution and other factors.
1. Select Size and Position > Blanking.
The Active Input Window value indicates the current size of your displayed data or region of
interest as defined by the blanking controls. By default, the projector automatically determines
what portion of its full resolution to use, and pixels in the surrounding borders are turned off.
M Series User Guide
020-101948-02 Rev. 1 (08-2018)
Copyright 2018 Christie Digital Systems USA, Inc. All rights reserved.
©
Adjusting the image
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